This is a 1957 Bulova Jefferson from late in the Art Deco era. The 10K Rolled Gold Plate case is of an attractive "claw lug" style that hides where the band attaches. The case back is marked L7. The 17 jewel 8AE movement appears to be a replacement because the date mark does not correspond with the case. New crystal & refinished dial. Best of all, it keeps time accurately.